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A fluid flow model in the lacunar-canalicular system under the pressure gradient and electrical field driven loads

Applied Mathematics and Mechanics(English Edition) 2022年第6期43卷 899-916页

作者： Xiaogang WU Xiyu WANG Chaoxin LI Zhaowei WANG Yuqin SUN Yang YAN Yixian QIN Pengcui LI Yanqin WANG Xiaochun WEI Weiyi CHEN College of Biomedical Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi Provincial Key Laboratory for Repair of Bone and Soft Tissue Injury Taiyuan 030001China

The lacunar-canalicular system(LCS)is acknowledged to directly participate in bone tissue *** fluid flow in the LCS is synergic driven by the pressure gradient and electric field loads due to the electro-mechanical properties of *** this paper,an idealized annulus Maxwell fluid flow model in bone canaliculus is established,and the analytical solutions of the fluid velocity,the fluid shear stress,and the fluid flow rate are *** results of the fluid flow under pressure gradient driven(PGD),electric field driven(EFD),and pressure-electricity synergic driven(P-ESD)patterns are compared and *** effects of the diameter of canaliculi and osteocyte processes are *** results show that the P-ESD pattern can combine the regulatory advantages of single PGD and EFD patterns,and the osteocyte process surface can feel a relatively uniform shear stress *** the bone canalicular inner radius increases,the produced shear stress under the PGD or P-ESD pattern increases slightly but changes little under the EFD *** increase in the viscosity makes the flow slow down but does not affect the fluid shear stress(FSS)on the canalicular inner wall and osteocyte process *** increase in the high-valent ions does not affect the flow velocity and the flow rate,but the FSS on the canalicular inner wall and osteocyte process surface increases *** this study,the results show that the shear stress sensed by the osteocyte process under the P-ESD pattern can be regulated by changing the pressure gradient and the intensity of electric field,as well as the parameters of the annulus fluid and the canaliculus size,which is helpful for the osteocyte mechanical *** established model provides a basis for the study of the mechanisms of electro-mechanical signals stimulating bone tissue(cells)growth.

关键词： bone canaliculi osteocyte process pressure gradient electricity fluid shear stress(FSS)

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